[China Glass Net] High-precision optical glass is commonly used in the production of invisible radar search mirrors, surveillance satellite camera lenses, high-speed aircraft windows, and optical lenses, prisms and other ultra-precision parts in laser emitting devices. The application of high-precision optical glass is very high in the polishing of optical glass. The following summarizes the basic requirements of the optical glass polishing powder. (1) The fine particle size is fine and uniform, within the allowable range; GUANGZHOU CHEER INDUSTRY CO LTD , https://www.fashionwholesale2.com
(2) It has high purity and contains no other mechanical impurities;
(3) It has very good dispersibility to ensure high efficiency and uniformity in the processing process, and appropriate dispersing agent can be added to increase the suspension rate;
(4) The micro-powder particles need to have a certain lattice shape, and form sharp edges and corners when crushing to improve the polishing efficiency;
(5) It has proper density and hardness, and has good wettability and suspensibility with water. The polishing powder needs to be mixed with water to make the polishing powder larger. The more grinding force, the more suitable for hard materials. It should be noted that the particle size of all the polishing powders has a distribution problem. The average particle size or the median diameter D50 only determines the speed of the polishing, and the maximum particle size Dmax determines the polishing precision. Therefore, in order to obtain high precision requirements, it is necessary to control the maximum particle size of the polishing powder.
The true hardness of the polishing powder is related to the material. For example, the hardness of the alumina type is about 9 Mohs hardness, and all kinds of alumina are similar. But different aluminas give people a different hardness. Due to the different firing temperatures, the strength of the agglomerates is not the same, so there is a feeling of different hardness when used, and the grinding rate and wear resistance exhibited by the products will be different. This requires an experienced production plant to control according to different materials. The concentration of the slurry during polishing determines the polishing speed, and the higher the concentration, the higher the polishing speed. When using a small particle polishing powder, the slurry concentration is appropriately lowered to obtain a suitable fluidity, and it is generally recommended to be 7-10%.